Image generating apparatus

Abstract

An image generating apparatus includes a print portion printing a paper, a platen roller arranged so as to be opposed to the print portion, a heat radiating member mounted on the print portion, radiating heat generated in the print portion, integrally provided with a plate-like support shaft as an axis of rotation and rotatable in a direction for coming into pressure contact with or separating from the platen roller, a regulating member regulating movement of the print portion in a printing direction of the paper, a chassis having a hole-shaped bearing receiving the plate-like support shaft, and a side plate mounted on the chassis.

What is claimed is: 
     
       1. An image generating apparatus comprising:
 a print portion printing a paper; 
 a platen roller arranged so as to be opposed to said print portion; 
 a heat radiating member mounted on said print portion, radiating heat generated in said print portion, integrally provided with a plate-like support shaft as an axis of rotation and rotatable in a direction for coming into pressure contact with or separating from said platen roller; 
 a regulating member regulating movement of said print portion in a printing direction of said paper; 
 a chassis having a hole-shaped bearing receiving said plate-like support shaft; and 
 a side plate mounted on said chassis; 
 wherein:
 said side plate integrally includes a contact portion capable of limiting movement of said support shaft of said heat radiating member in an axial direction, and 
 said contact portion is so formed as to be elastically deformable in a direction intersecting with the axial direction of said support shaft up to a position where said contact portion does not come into contact with said plate-like support shaft inserted into said hole-shaped bearing. 
 
 
     
     
       2. The image generating apparatus according to  claim 1 , wherein
 said contact portion is provided on said side plate across said hole-shaped bearing. 
 
     
     
       3. The image generating apparatus according to  claim 1 , wherein
 said hole-shaped bearing receiving said plate-like support shaft is formed in a sectorial shape. 
 
     
     
       4. The image generating apparatus according to  claim 1 , wherein
 said plate-like support shaft includes first and second support shafts integrally provided on said heat radiating member so as to protrude outward from first and second end surface portions of said heat radiating member respectively, and 
 the length from an end of said second support shaft provided on said second end surface portion of said heat radiating member to said first end surface portion of said heat radiating member is smaller than the length from a first side surface of said chassis to a second side surface of said chassis. 
 
     
     
       5. The image generating apparatus according to  claim 1 , further comprising a feed roller transporting said paper, wherein
 said regulating member is so formed as to function as a bearing of said feed roller. 
 
     
     
       6. The image generating apparatus according to  claim 5 , wherein
 said regulating member functioning as the bearing of said feed roller includes a protrusion protruding toward said print portion. 
 
     
     
       7. The image generating apparatus according to  claim 1 , further comprising a pressing member rotatably formed and pressing said print portion toward said platen roller, wherein
 a pushed-up portion pushed up with said pressing member when said pressing member rotates is integrally provided on said heat radiating member, and 
 said pushed-up portion of said heat radiating member is pushed up with said pressing member when said pressing member rotates so that said heat radiating member and said print portion rotate in a direction for separating from said platen roller. 
 
     
     
       8. The image generating apparatus according to  claim 7 , wherein
 said pressing member presses said print portion toward said platen roller in printing, and 
 said heat radiating member includes a deviation stopper preventing said pressing member from deviating in a rotational direction when said pressing member presses said print portion toward said platen roller in printing. 
 
     
     
       9. The image generating apparatus according to  claim 7 , wherein
 said pressing member is made of resin. 
 
     
     
       10. An image generating apparatus comprising:
 a print portion printing a paper; 
 a platen roller arranged so as to be opposed to said print portion; 
 a heat radiating member mounted on said print portion and radiating heat generated in said print portion; 
 a regulating member regulating movement of said print portion in a printing direction of said paper; 
 a chassis; 
 a side plate mounted on said chassis; and 
 a feed roller transporting said paper, wherein 
 said heat radiating member is formed integrally with a plate-like support shaft as an axis of rotation and rotates in a direction for coming into pressure contact with or separating from said platen roller, 
 said chassis has a sectorial hole-shaped bearing receiving said plate-like support shaft, 
 said side plate integrally includes a contact portion capable of limiting movement of said support shaft of said heat radiating member in an axial direction, 
 said contact portion is elastically deformed in a direction intersecting with the axial direction of said support shaft up to a position where said contact portion does not come into contact with said plate-like support shaft inserted into said hole-shaped bearing, 
 said plate-like support shaft includes first and second support shafts integrally provided on said heat radiating member so as to protrude outward from first and second end surface portions of said heat radiating member respectively, 
 the length from an end of said second support shaft provided on said second end surface portion of said heat radiating member to said first end surface portion of said heat radiating member is smaller than the length from a first side surface of said chassis to a second side surface of said chassis, and 
 said regulating member is so formed as to function as a bearing of said feed roller. 
 
     
     
       11. The image generating apparatus according to  claim 10 , wherein
 said contact portion is provided on said side plate across said hole-shaped bearing. 
 
     
     
       12. The image generating apparatus according to  claim 10 , wherein
 said regulating member functioning as the bearing of said feed roller includes a protrusion protruding toward said print portion. 
 
     
     
       13. The image generating apparatus according to  claim 10 , further comprising a pressing member rotatably formed and pressing said print portion toward said platen roller, wherein
 a pushed-up portion pushed up with said pressing member when said pressing member rotates is integrally provided on said heat radiating member, and 
 said pushed-up portion of said heat radiating member is pushed up with said pressing member when said pressing member rotates so that said heat radiating member and said print portion rotate in a direction for separating from said platen roller. 
 
     
     
       14. The image generating apparatus according to  claim 13 , wherein
 said pressing member presses said print portion toward said platen roller in printing, and 
 said heat radiating member includes a deviation stopper preventing said pressing member from deviating in a rotational direction when said pressing member presses said print portion toward said platen roller in printing. 
 
     
     
       15. The image generating apparatus according to  claim 13 , wherein
 said pressing member is made of resin.